fix(i18n): add missing sidebar message keys to all locales (#896)

The sidebar `messages` namespace was missing six keys that are referenced
in `useSidebarController.ts`:

- messages.updateProjectError (rename / star-toggle failure)
- messages.refreshError (project list refresh failure)
- messages.restoreProjectFailed / restoreProjectError
- messages.restoreSessionFailed / restoreSessionError

`updateProjectError` and `refreshError` are called via `t()` without an
inline default, so on failure users see the raw key string
"messages.updateProjectError" / "messages.refreshError" instead of a
message. The four restore.* keys have inline English defaults in the code,
so they previously fell back to English even in non-English UIs.

Adds all six keys to every locale (de, en, fr, it, ja, ko, ru, tr,
zh-CN, zh-TW), matching the existing wording/style of the neighbouring
delete/create messages in each file.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/i18n/locales/de/sidebar.json

@@ -106,7 +106,13 @@
     "deleteProjectFailed": "Projekt konnte nicht entfernt werden. Bitte erneut versuchen.",
     "deleteProjectError": "Fehler beim Entfernen des Projekts. Bitte erneut versuchen.",
     "createProjectFailed": "Projekt konnte nicht erstellt werden. Bitte erneut versuchen.",
-    "createProjectError": "Fehler beim Erstellen des Projekts. Bitte erneut versuchen."
+    "createProjectError": "Fehler beim Erstellen des Projekts. Bitte erneut versuchen.",
+    "updateProjectError": "Fehler beim Aktualisieren des Projekts. Bitte erneut versuchen.",
+    "refreshError": "Aktualisierung fehlgeschlagen. Bitte erneut versuchen.",
+    "restoreProjectFailed": "Projekt konnte nicht wiederhergestellt werden. Bitte erneut versuchen.",
+    "restoreProjectError": "Fehler beim Wiederherstellen des Projekts. Bitte erneut versuchen.",
+    "restoreSessionFailed": "Sitzung konnte nicht wiederhergestellt werden. Bitte erneut versuchen.",
+    "restoreSessionError": "Fehler beim Wiederherstellen der Sitzung. Bitte erneut versuchen."
   },
   "version": {
     "updateAvailable": "Update verfügbar"

src/i18n/locales/en/sidebar.json

@@ -106,7 +106,13 @@
     "deleteProjectFailed": "Failed to remove project. Please try again.",
     "deleteProjectError": "Error removing project. Please try again.",
     "createProjectFailed": "Failed to create project. Please try again.",
-    "createProjectError": "Error creating project. Please try again."
+    "createProjectError": "Error creating project. Please try again.",
+    "updateProjectError": "Error updating project. Please try again.",
+    "refreshError": "Failed to refresh. Please try again.",
+    "restoreProjectFailed": "Failed to restore project. Please try again.",
+    "restoreProjectError": "Error restoring project. Please try again.",
+    "restoreSessionFailed": "Failed to restore session. Please try again.",
+    "restoreSessionError": "Error restoring session. Please try again."
   },
   "version": {
     "updateAvailable": "Update available"

src/i18n/locales/fr/sidebar.json

@@ -106,7 +106,13 @@
     "deleteProjectFailed": "Échec de la suppression du projet. Veuillez réessayer.",
     "deleteProjectError": "Erreur lors de la suppression du projet. Veuillez réessayer.",
     "createProjectFailed": "Échec de la création du projet. Veuillez réessayer.",
-    "createProjectError": "Erreur lors de la création du projet. Veuillez réessayer."
+    "createProjectError": "Erreur lors de la création du projet. Veuillez réessayer.",
+    "updateProjectError": "Erreur lors de la mise à jour du projet. Veuillez réessayer.",
+    "refreshError": "Échec de l'actualisation. Veuillez réessayer.",
+    "restoreProjectFailed": "Échec de la restauration du projet. Veuillez réessayer.",
+    "restoreProjectError": "Erreur lors de la restauration du projet. Veuillez réessayer.",
+    "restoreSessionFailed": "Échec de la restauration de la session. Veuillez réessayer.",
+    "restoreSessionError": "Erreur lors de la restauration de la session. Veuillez réessayer."
   },
   "version": {
     "updateAvailable": "Mise à jour disponible"

src/i18n/locales/it/sidebar.json

@@ -106,7 +106,13 @@
     "deleteProjectFailed": "Impossibile rimuovere il progetto. Riprova.",
     "deleteProjectError": "Errore durante la rimozione del progetto. Riprova.",
     "createProjectFailed": "Impossibile creare il progetto. Riprova.",
-    "createProjectError": "Errore durante la creazione del progetto. Riprova."
+    "createProjectError": "Errore durante la creazione del progetto. Riprova.",
+    "updateProjectError": "Errore durante l'aggiornamento del progetto. Riprova.",
+    "refreshError": "Aggiornamento non riuscito. Riprova.",
+    "restoreProjectFailed": "Impossibile ripristinare il progetto. Riprova.",
+    "restoreProjectError": "Errore durante il ripristino del progetto. Riprova.",
+    "restoreSessionFailed": "Impossibile ripristinare la sessione. Riprova.",
+    "restoreSessionError": "Errore durante il ripristino della sessione. Riprova."
   },
   "version": {
     "updateAvailable": "Aggiornamento disponibile"

src/i18n/locales/ja/sidebar.json

@@ -105,7 +105,13 @@
     "deleteProjectFailed": "プロジェクトの除去に失敗しました。もう一度お試しください。",
     "deleteProjectError": "プロジェクトの除去でエラーが発生しました。もう一度お試しください。",
     "createProjectFailed": "プロジェクトの作成に失敗しました。もう一度お試しください。",
-    "createProjectError": "プロジェクトの作成でエラーが発生しました。もう一度お試しください。"
+    "createProjectError": "プロジェクトの作成でエラーが発生しました。もう一度お試しください。",
+    "updateProjectError": "プロジェクトの更新でエラーが発生しました。もう一度お試しください。",
+    "refreshError": "更新に失敗しました。もう一度お試しください。",
+    "restoreProjectFailed": "プロジェクトの復元に失敗しました。もう一度お試しください。",
+    "restoreProjectError": "プロジェクトの復元でエラーが発生しました。もう一度お試しください。",
+    "restoreSessionFailed": "セッションの復元に失敗しました。もう一度お試しください。",
+    "restoreSessionError": "セッションの復元でエラーが発生しました。もう一度お試しください。"
   },
   "version": {
     "updateAvailable": "アップデートあり"

src/i18n/locales/ko/sidebar.json

@@ -105,7 +105,13 @@
     "deleteProjectFailed": "프로젝트 제거 실패. 다시 시도해주세요.",
     "deleteProjectError": "프로젝트 제거 오류. 다시 시도해주세요.",
     "createProjectFailed": "프로젝트 생성 실패. 다시 시도해주세요.",
-    "createProjectError": "프로젝트 생성 오류. 다시 시도해주세요."
+    "createProjectError": "프로젝트 생성 오류. 다시 시도해주세요.",
+    "updateProjectError": "프로젝트 업데이트 오류. 다시 시도해주세요.",
+    "refreshError": "새로고침 실패. 다시 시도해주세요.",
+    "restoreProjectFailed": "프로젝트 복원 실패. 다시 시도해주세요.",
+    "restoreProjectError": "프로젝트 복원 오류. 다시 시도해주세요.",
+    "restoreSessionFailed": "세션 복원 실패. 다시 시도해주세요.",
+    "restoreSessionError": "세션 복원 오류. 다시 시도해주세요."
   },
   "version": {
     "updateAvailable": "업데이트 가능"

src/i18n/locales/ru/sidebar.json

@@ -106,7 +106,13 @@
     "deleteProjectFailed": "Не удалось убрать проект. Попробуйте снова.",
     "deleteProjectError": "Ошибка при удалении проекта из списка. Попробуйте снова.",
     "createProjectFailed": "Не удалось создать проект. Попробуйте снова.",
-    "createProjectError": "Ошибка при создании проекта. Попробуйте снова."
+    "createProjectError": "Ошибка при создании проекта. Попробуйте снова.",
+    "updateProjectError": "Ошибка при обновлении проекта. Попробуйте снова.",
+    "refreshError": "Не удалось обновить. Попробуйте снова.",
+    "restoreProjectFailed": "Не удалось восстановить проект. Попробуйте снова.",
+    "restoreProjectError": "Ошибка при восстановлении проекта. Попробуйте снова.",
+    "restoreSessionFailed": "Не удалось восстановить сеанс. Попробуйте снова.",
+    "restoreSessionError": "Ошибка при восстановлении сеанса. Попробуйте снова."
   },
   "version": {
     "updateAvailable": "Доступно обновление"

src/i18n/locales/tr/sidebar.json

@@ -106,7 +106,13 @@
     "deleteProjectFailed": "Proje kaldırılamadı. Lütfen tekrar dene.",
     "deleteProjectError": "Proje kaldırılırken hata oluştu. Lütfen tekrar dene.",
     "createProjectFailed": "Proje oluşturulamadı. Lütfen tekrar dene.",
-    "createProjectError": "Proje oluşturulurken hata oluştu. Lütfen tekrar dene."
+    "createProjectError": "Proje oluşturulurken hata oluştu. Lütfen tekrar dene.",
+    "updateProjectError": "Proje güncellenirken hata oluştu. Lütfen tekrar dene.",
+    "refreshError": "Yenileme başarısız. Lütfen tekrar dene.",
+    "restoreProjectFailed": "Proje geri yüklenemedi. Lütfen tekrar dene.",
+    "restoreProjectError": "Proje geri yüklenirken hata oluştu. Lütfen tekrar dene.",
+    "restoreSessionFailed": "Oturum geri yüklenemedi. Lütfen tekrar dene.",
+    "restoreSessionError": "Oturum geri yüklenirken hata oluştu. Lütfen tekrar dene."
   },
   "version": {
     "updateAvailable": "Güncelleme mevcut"

src/i18n/locales/zh-CN/sidebar.json

@@ -106,7 +106,13 @@
     "deleteProjectFailed": "移除项目失败，请重试。",
     "deleteProjectError": "移除项目时出错，请重试。",
     "createProjectFailed": "创建项目失败，请重试。",
-    "createProjectError": "创建项目时出错，请重试。"
+    "createProjectError": "创建项目时出错，请重试。",
+    "updateProjectError": "更新项目时出错，请重试。",
+    "refreshError": "刷新失败，请重试。",
+    "restoreProjectFailed": "恢复项目失败，请重试。",
+    "restoreProjectError": "恢复项目时出错，请重试。",
+    "restoreSessionFailed": "恢复会话失败，请重试。",
+    "restoreSessionError": "恢复会话时出错，请重试。"
   },
   "version": {
     "updateAvailable": "有可用更新"

src/i18n/locales/zh-TW/sidebar.json

@@ -105,7 +105,13 @@
     "deleteProjectFailed": "移除專案失敗，請重試。",
     "deleteProjectError": "移除專案時出錯，請重試。",
     "createProjectFailed": "建立專案失敗，請重試。",
-    "createProjectError": "建立專案時出錯，請重試。"
+    "createProjectError": "建立專案時出錯，請重試。",
+    "updateProjectError": "更新專案時出錯，請重試。",
+    "refreshError": "重新整理失敗，請重試。",
+    "restoreProjectFailed": "還原專案失敗，請重試。",
+    "restoreProjectError": "還原專案時出錯，請重試。",
+    "restoreSessionFailed": "還原工作階段失敗，請重試。",
+    "restoreSessionError": "還原工作階段時出錯，請重試。"
   },
   "version": {
     "updateAvailable": "有可用更新"